There are books in the library, but I can't find them. Maybe it's because there are no books in their place, or some people have hidden them. Personally, I suggest that books recommended by teachers should not be found in the library, and generally will not be borrowed. After all, at least one class knows to borrow this book as soon as the teacher recommends it. If you can't find a paper book, you can try e-books or document delivery and ask for some books.